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v1.0.0
ICD-10 Guide
ICD-10 CodesQ66.51

Q66.51

Billable

Congenital pes planus, right foot

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/11/2025

Code Description

ICD-10 Q66.51 is a billable code used to indicate a diagnosis of congenital pes planus, right foot.

Key Diagnostic Point:

Congenital pes planus, commonly referred to as flatfoot, is a condition characterized by the absence of the normal arch of the foot. In the case of Q66.51, this condition is specifically noted for the right foot. It is often identified in infants and young children, where the foot appears flat when standing. The condition can be asymptomatic or may lead to discomfort, pain, or difficulty in walking as the child grows. The etiology of congenital pes planus can be multifactorial, including genetic predispositions, environmental factors, and associated neuromuscular disorders. Diagnosis typically involves a physical examination and may include imaging studies to rule out other structural abnormalities. Treatment options vary based on severity and symptoms, ranging from observation and orthotic devices to surgical intervention in more severe cases. Accurate coding is essential for proper management and reimbursement, especially in pediatric populations where early intervention can significantly impact long-term outcomes.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and severity of the condition.
  • Need for precise documentation of foot involvement (right vs. left).
  • Potential for co-occurring musculoskeletal conditions.
  • Differentiation from acquired flatfoot conditions.

Audit Risk Factors

  • Inadequate documentation of the condition's severity.
  • Failure to specify laterality (right vs. left).
  • Misclassification with acquired flatfoot conditions.
  • Lack of supporting clinical evidence for treatment provided.

Specialty Focus

Medical Specialties

Pediatrics

Documentation Requirements

Documentation should include a thorough physical examination, family history, and any associated conditions. Growth and developmental milestones should also be noted.

Common Clinical Scenarios

Common scenarios include routine pediatric check-ups where flatfoot is identified, or referrals for orthopedic evaluation due to complaints of foot pain.

Billing Considerations

Consideration must be given to the child's age and developmental stage, as many children may present with flexible flatfoot that resolves with growth.

Genetics

Documentation Requirements

Genetic counseling notes should include family history of foot deformities and any syndromic associations. Genetic testing results, if applicable, should be documented.

Common Clinical Scenarios

Scenarios may include referrals for genetic evaluation when pes planus is part of a syndrome or associated with other congenital anomalies.

Billing Considerations

Genetic factors may play a role in the presentation of pes planus, and documentation should reflect any relevant genetic syndromes.

Coding Guidelines

Inclusion Criteria

Use Q66.51 When
  • Follow official ICD
  • CM guidelines for coding congenital conditions, ensuring accurate laterality and specificity
  • Documentation must support the diagnosis and any associated conditions

Exclusion Criteria

Do NOT use Q66.51 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

28485CPT Code

Surgical correction of flatfoot

Clinical Scenario

Used when surgical intervention is required for severe cases of congenital pes planus.

Documentation Requirements

Surgical notes must detail the procedure and rationale for surgery.

Specialty Considerations

Orthopedic specialists should provide comprehensive documentation of the condition and treatment plan.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for greater specificity in coding congenital conditions, improving the accuracy of diagnoses and treatment plans.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for greater specificity in coding congenital conditions, improving the accuracy of diagnoses and treatment plans.

Reimbursement & Billing Impact

reimbursement.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What is the difference between congenital pes planus and acquired flatfoot?

Congenital pes planus is a developmental condition present at birth, characterized by a lack of arch in the foot. Acquired flatfoot develops later in life due to various factors, including injury, obesity, or degenerative conditions.